Question

Which statement about a system at equilibrium is true?(1) The forward reaction rate is less than the reverse reaction rate.(2) The forward reaction rate is greater than the reverse reaction rate.(3) The forward reaction rate is equal to the reverse reaction rate.(4) The forward reaction rate stops and the reverse reaction rate continues.

Answer 1

Answer: Option (3) is the correct answer.

Explanation:

A reaction in which the concentration of reactants equal to the concentration of products is known as an equilibrium reaction.

For example, $Ca(OH)_{2}(s) + H_{2}O(l) \rightleftharpoons Ca^{2+}(aq) + 2OH^{-}(aq)$

Therefore, we can also say that in an equilibrium reaction rate of forward reaction becomes equal to the backward reaction.

Answer 2

(3) the forward reaction rate is equal to the reverse reaction rate
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